2.lis 02 programme narrative 25.10.2015

8/19/2019 2.LIS 02 Programme Narrative 25.10.2015

1/19

DESIGN & CONSTRUCTION OF LATERAL INTERSEPTOR SEWERS-LIS-02

PROJECT ID: IA 13/14 C 40 M

APPENDIX J: 12.1.4 PROGRAMME NARRATIVE STATEMENT

P!"#$% D#$'(%'!)

To meet the growing population Ashghal has proposed IDRIS program which involves

upgrading and expanding the Sewerage system network.

From Al-akra to S! "onstruction o# $ateral interceptor sewers have %een proposed and

"onstruction o# this $ateral Sewer package comes under $IS-&'. The ork comprises o#

detailed design( associated procurement( construction( and testing along with de#ects

correction during the )aintenance period. Apart #rom the a%ove *+" will %e collecting

additional data and in#ormation( liaising with relevant authorities( o%taining design approvals

and statutory approvals( protecting and diverting utilities( temporary works( pu%lic relations

and other ancillary work as re,uired #or the completion o# the orks.

P*+))'), M#%!!*!,

*+" will start the proect with su%mission and approval o# necessary permits( various pre-

construction plans( work method statements( materials etc. Also incorporated in this stageis the mo%iliation o# the site o##ices( the re,uired plant / machinery etc.

A#ter getting the approval #or R01( site survey works and additional ground investigation

works will %e conducted during the allocated time 2a%out 3 weeks4. During this same period

*+" will o%tain other additional permits that are re,uired and will %e #ollowed %y the

excavation permit approval and then %y the construction o# the tra##ic diversions( which will

%e done in stages at the location o# sha#ts.

in order not to disrupt the tra##ic #low and %y providing temporary diversion and will maintain

tra##ic #low throughout the period o# construction in the $imit o# work one and to accomplish

the proect delivera%les on time .

The split works will %e executed %y construction o# temporary sha#ts( Tunneling(

"onstruction o# )anholes( 5ortex drop %ox6s and Air ventilation cham%ers as per the

approval o# the 7ngineer.

A(%'!) ! %# D+% +#*')# P!,+#

*+" will execute the work in #our locations simultaneously using separate teams( or Drives.

The Dra#t +aseline 8rogram has %een developed %ased on the #ollowing9

Design & Construction of Lateral Interceptor Sewers (Contract LIS-02) Page 1 of 19


2/19

A#ter the conditional approval o# design %y the *"7( non-o%ection will %e given %y the7ngineer and access to the site will %e given to *+" a#ter su%mission o# pre-re,uisitedocuments. e intend to start the work with sa#ety %arricading o# the area where theconstruction activity will %e involved. The Tunneling works have %een split into #our locations and %ased on the approval o# design the work will %e started as per the approved

+aseline 8rogram assuming that all the necessary permits and approvals will %e issued ontime and no o%structions will stop *+"6s work progress.

*+" assumes that all the "lient and :overnment authorities6 permits; approvals;sanctionswill %e prepared on time without any delays or interruptions #or the work to start inaccordance with the 8rogramme.

*+" assumes that i# any scope o# the proect changes or any additional works or un#oreseen conditions are incurred( it will a##ect the end date o# the proect and the "lientwill extend the re,uired time allocation #or such works.

M#%!!*!, ! )!)-(!$%'# !

*+" a%ides with the *atar la%our laws on construction sites. In the dra#t +aseline8rogramme the non-productive hours during the month o# Ramadan have %een consideredand the allowa%le working time during this period is considered as ey Dates

• Sectional "ompletion

Site 8reparation

• Drive-=• Drive-'

• Drive-1

• Drive-?

Inter#ace Issues

8ermits and approvals

0##ices and Temporary Facilities

Insurances

+onds and :uarantees

8roect Assurances

)ethod statements



3/19

0ther contractual re,uirements

• 8rocurement :eneral

:eneral and +ulk )aterials

Su%-"ontractors

8recast Segments• 7xecution

7xecution 2:eneral4

"oordination and Data collection

Survey works and Supplementary soil investigation works

Design "riteria and other general su%mittals

Drive &= @ All $ines-pstream o# SB C;1'

Temporary work Sha#ts

• Detailed Design

• 8rocurement

•"onstruction

8ipe acking

• Detailed Design

• 8rocurement

• "onstruction

)anhole "onstruction

• Detailed Design

• 8rocurement

• "onstruction

Drive &' @ From SB C;1' to SB C;'=


• Detailed Design

• 8rocurement

• "onstruction

8ipe acking

• Detailed Design

• 8rocurement

• "onstruction


•

Detailed Design• 8rocurement

• "onstruction

• )anhole

Drive &1 @ From SB C;'= to SB C;==


• Detailed Design

• 8rocurement

• "onstruction

8ipe acking

• Detailed Design• 8rocurement



4/19

• "onstruction


• Detailed Design

• 8rocurement

•

"onstruction• )anhole

Drive &? @ From SB C;== to SB C;=( From SB C;= to S&! and SB C;3& to S&!


• Detailed Design

• 8rocurement

• "onstruction

8ipe acking

• Detailed Design

• 8rocurement

• "onstruction )anhole "onstruction

• Detailed Design

• 8rocurement

• "onstruction

• )anhole

• Su%stantial completion

• De#ect $ia%ility

"lose out

For programming and planning purposes each su% division is #urther divided into variouslevels %ased on the type o# activities involved.

GENERAL

C!)%+$%+* D+%#

The 8roect starts on ?th 0cto%er '&=< as the commencement date and the proectduration o# ==3E days are allocated #or detailed design( site investigations( utility diversions(materials procurement( construction( and testing / commissioning. A#ter completion o# allthe associated work involved in the $IS-&' 8roect( the De#ect $ia%ility 8eriod will

commence #rom =3th Decem%er '&=C and will %e completed a#ter 13< days. 5# D+%#

The two speci#ied key dates are %reakthrough into S&! #rom SB C;= and %reakthroughinto S&! #rom SB C;3&. "ommencement date and duration #or the %reakthrough will %ecoordinated %y *+" with )TS-&' and )TS-&1 contractors.

As per the dra#t program the %reakthrough #rom SB C;= to S&! is expected to %egin #rom?th anuary '&=C till =!th Fe%ruary '&=C and #rom SB C;3& to S&! is expected to %egin#rom ==th )arch '&=C till '?th April '&=C.



5/19

SB C;= S&! SB C;3&

S#$%'!)+* C!(*#%'!) D+%#

"ompletion o# Temporary sha#ts( +reakthrough into S&! and )anhole completion at SBC;= and SB C;3& are expected to %e commence #rom '?th August '&=! and will %ecompleted %y =


6/19

is %een estimated to complete the site preparation and utility diversion works. +e#ore thecommencement o# work the site %oundary will %e secured. +elow shown se,uence will %e#ollowed and an estimated duration o# ?&C working calendar days are re,uired #or completion o# site preparation and utility diversion work.

S6 7/32 S6 7/33 S6 7/34 --------$!)%')!-------- S67/3/10

D'#-2:

At Drive-' setting out works will commence and will %e #ollowed with the utilitydiversion works %y o%taining approvals prior to the diversion o# utility works. Duration o# 13days #or each sha#t is %een estimated to complete the site preparation and utility diversionworks. +e#ore the commencement o# work the site %oundary will %e secured. +elow shownse,uence will %e #ollowed and an estimated duration o# ?!3 working calendar days arere,uired #or completion o# site preparation and utility diversion work. "ommencement o# sitepreparation works are expected to start #rom =!th April '&=3

S6 7/31 S6 7/30 S6 7/28 --------$!)%')!-------- S67/21

D'#-3

At Drive-1 setting out works will commence and will %e #ollowed with the utilitydiversion works %y o%taining approvals prior to the diversion o# utility works. Duration o# 13days #or each sha#t is %een estimated to complete the site preparation and utility diversionworks. +e#ore the commencement o# work the site %oundary will %e secured. +elow shownse,uence will %e #ollowed and an estimated duration o#


7/19

S6 7/10 S6 7/8 S6 7/7 --------$!)%')!-------- S67/;0

I)%#+$# '#

During the initial stage o# preliminary design inter#ace issues with the %elow mentioned

parties will %e resolved and we will %e noti#ying and coordinating with the inter#acing parties;contractors during the construction period where re,uired.

• "oordinating with )TS-&'-"ontractor #or %reak-in at S&!

• "oordinating with )TS-&1-"ontractor #or %reak-in at S&!

• "oordinating with T8S;ST-&=-"ontractor #or installation o# duct

• "oordinating with 7xpressway programme "ontractors at the 8roect =


8/19

Similarly the "7)8( 7nvironmental management system( 7nvironment risk assessment(aste )anagement 8lan and el#are Adherence 8lan will %e su%mitted to the *"7 anda#ter o%taining approval( the documents will %e #orwarded to the 7ngineer #or non-o%ection. Su%mission o# the a%ove said documents will %e during the period stipulated in5olume '.

M#%! S%+%##)%

0%taining approvals #or the method statement will %e done prior to the construction works%egin on site.

O%# C!)%+$%+* R# +%#'+*)aterials re,uired #or the proect will %e procured in a timely %asis a#ter o%taining #inalapproval #rom the 7ngineer.

P!$##)% ! MTM

)ost )T+)6s to %e used on the 8roect will %e sourced #rom the existing :T" #leet. Detailsregarding any additional e,uipment to %e procured #or use on the 8roect will %e su%mittedto the 7ngineer #or in#ormation. The time #rame re,uired to deliver the new machinery tosite will %e approximately 3-Cmonths in total. During this period existing )T+) e,uipmentwill %e re#ur%ished and will %e mo%ilied on to the site and works will commence #ollowingapproval o# shop drawings and receipt o# re,uisite permits;authoriation.

S? C!)%+$%!

>ey su%contractors re,uired #or the Survey works( Site investigation works( material testingworks and tility diversion works will %e noti#ied to the 7ngineer #or his approval. 0nce the

approval o# su%contractors is received su%contract work will commence where re,uired inthe 8roect.

EXECUTION

E@#$%'!) G#)#+*B

These works have %een divided into9 Survey works and supplementary soil investigation works

Design criteria

0ther general su%mittals

S# !> +) ((*##)%+ !'* ')#%',+%'!) !>:



9/19

As speci#ied the survey works will %egin a#ter the approval #rom the 7ngineer along witho%taining R01 8ermit. Supplementary soil investigation works will %e carried out %y anapproved su%contractor. A detailed report o# the survey works and soil investigation workswill %e su%mitted to the 7ngineer.

D#',) $'%#'+

Design work commence with the su%mission o# a Design )anagement 8lan( Design Assurance System( Design "riteria Report( "onstruction Impact Assessment Report(8reliminary Bydraulic Design and 8reliminary Design will commence %ased on the existingdata #rom the "ontract. The a%ove said design works will %e su%mitted to *"7 and a#ter theapproval o# *"7( the design works will %e #orwarded to the 7ngineer #or his non-o%ection.

"FD and 8hysical modeling will commence a#ter completion o# 8reliminary design works. Additional soil investigation and survey report will %e used in preparation o# detailed designalong with the existing data.

+I) detailed report will %e su%mitted to the 7ngineer as re,uired and discussed prior to thecommencement o# +I) work.

O%# ,#)#+* ?'%%+*

The %elow mentioned documents will %e su%mitted to the 7ngineer in stipulated time #rameprovided in the contract document and a#ter o%taining approval site access will %e grantedto *+".

8roect controls plan

Risk management plan

Bealth / sa#ety plan

$ogistics management plan

"onsents plan

D'# 1 - A** L')# (-%#+ ! S6 7/32

L!$+%'!)-1

T#(!+ +% C!)%$%'!) A#ter approval o# detailed design( a method statement and diversion o# utilities will %e

carried out at Sha#t SB C;1C and commencement o# temporary sha#t will take place

8rimary Secondary 8rimary



10/19

At sha#t SB C;1C secant pile works will %e adopted. Secant pile works %egin with

construction o# a guide wall. A#ter completion o# guide wall installation( casing will %e done

and auger %oring will %e done through the casing a#ter attaining desired depth grouting

works will commence and concreting o# primary secant pile will %e done. Alternative pilingwill %e done. The #igure %elow shows the se,uence o# work that will %e adopted #or

executing the secant piling work. Secondary piles are installed with rein#orcement %ars.

0nce the secant piling works are done( excavation works will commence down to the

%ottom o# designed temporary sla%. "oncreting works will commence only a#ter completion

o# epoxy grouting o# rein#orcement into the secant pile and tie in with the temporary sla%

rein#orcement. $aunching head and ring %eam concreting 2support4 will %e constructed in

order to place the acking #rame #or )T+).

A#ter completion o# Secant piling works the machine will %e shi#ted to another location that

is SB C;1E and the a%ove procedure will %e repeated.

S6 7/37 S6 7/38 S6 7/40 --------$!)%')!-------- S67/99

Around

"ommencement o# )T+) works start with completion o# ' num%ers o# temporary sha#ts. In

the Drive-=9 $ocation-= the driving o# micro tunnel starts #rom SB C;1E to SB C;1C and #rom

SB C;1E to SB C;?&. The %elow mentioned strategy will %e applica%le #or 3&& mm diameter

pipe i# the invert level di##erence o# receiving sha#t is less than 'C& mm.

S6 7/37 S6 7/38 S6 7/40



11/19

For the Drive-= $ocation-= #ollowing driving strategy will %e adopted.

Driving #rom SB C;1E to SB C;1C

Driving #rom SB C;1E to SB C;?&

Driving #rom SB C;?= to SB C;?& Driving #rom SB C;?= to SB C;?'

Driving #rom SB C;?';= to SB C;?'

Driving #rom SB C;?1 to SB C;?'

Driving #rom SB C;?1 to SB C;??

Driving #rom SB C;1C to SB C;1!

Driving #rom SB C;?< to SB C;??

Driving #rom SB C;?< to SB C;?3

Driving #rom SB C;?3 to SB C;?!

Driving #rom SB C;?3 to SB C;?<

Driving #rom SB C;?! to SB C;?C

Driving #rom SB C;?E to SB C;?C

Driving #rom SB C;?E to SB C;


12/19

Stripping #ormwork the day a#ter casting and apply approved curing compound to

vertical #aces.

Installing shoring inside the cham%er to support the cham%er roo# #ormwork.

Fixing cham%er roo# re%ar ensuring ade,uate overlap with wall rein#orcement and

starter %ars #or access sha#t Fixing #ormwork to vertical #ace o# cham%er roo#.

"asting "?& concrete roo# sla%.

A#ter =? days strip and remove cham%er shoring / #ormwork through the access

sha#t opening.

Apply primer and tanking mem%rane to all external concrete #aces.

+ack#ill the cham%er using high slump weak concrete or manually compacted

common #ill in =


13/19

0nce the secant piling works are #inished( excavation works will commence down to the

%ottom o# designed temporary sla%. "oncreting works will commence only a#ter completion

o# epoxy grouting o# rein#orcement into the secant pile and tie in with the temporary sla%rein#orcement. A#ter completion o# Secant piling works the machine will %e shi#ted to

another location that is SB C;11 and the a%ove procedure will %e repeated.

S6 7/32 S6 7/33 S6 7/34 --------$!)%')!-------- S67/3/10

Around 3!! calendar days are re,uired to complete the =C num%er o# temporary sha#t

construction works at Drive-=9 $ocation-'.

M'$! %))#*'), ''), !>

"ommencement o# )T+) works start with completion o# ' num%ers o# temporary sha#ts. In

the Drive-=9 $ocation-' the driving o# micro tunnel starts #rom SB C;11 to SB C;1? and #rom

SB C;11 to SB C;1'. The %elow mentioned strategy will %e applica%le #or 3&& mm diameter

pipe i# the invert level di##erence o# receiving sha#t is less than 'C& mm.

S6 7/34 S6 7/33 S6 7/32

For the Drive-= $ocation-' #ollowing driving strategy will %e adopted.

Driving #rom SB C;11 to SB C;1?

Driving #rom SB C;11 to SB C;1'

Driving #rom SB C;1< to SB C;1?

Driving #rom SB C;1< to SB C;13

Driving #rom SB C;1?;= to SB C;1?

Driving #rom SB C;1! to SB C;13

Driving #rom SB C;1! to SB C;1!;=

Driving #rom SB C;1!;' to SB C;1!;=



14/19

Driving #rom SB C;1!;' to SB C;1!;1

Driving #rom SB C;1!;? to SB C;1!;1

Driving #rom SB C;1!;? to SB C;1!;<

Driving #rom SB C;1!;3 to SB C;1!;<

Driving #rom SB C;1!;3 to SB C;1!;!

Driving #rom SB C;1!;C to SB C;1!;!

Driving #rom SB C;1!;C to SB C;1!;E

Driving #rom SB C;1!;=& to SB C;1!;E

For the a%ove driving works estimated working calendar duration is around 1!3 days.

M+)!*# $!)%$%'!) !>

The #ollowing construction se,uence will %e adopted #or manhole construction9

"asting SR" '& %linding concrete on top o# temporary sha#t %ase sla% to achievecorrect #ounding level #or %ase cham%er.

Applying approved primer and tanking mem%rane.

"asting


15/19

Bere movement o# crew will take place a#ter the completion o# sla% works and part o# the

crew will %e working on the next sha#t which will %e ready #or construction o# manhole. ?3&

days are re,uired to complete =! manholes located at Drive-=9 $ocation-'.

D'# 2 ! S6 7/32 %! S6 7/21

T#(!+ +% C!)%$%'!)

A#ter approval o# detailed design( method statement and diversion o# utilities will %e done at

Sha#t SB C;1= and temporary sha#t construction will %egin.

8rimary Secondary 8rimary

At sha#t SB C;1= a diaphragm wall will %e constructed #or temporary sha#t support.

Diaphragm walls will %egin with construction o# a guide wall. A#ter completion o# :uide wall

installation( "lam shell will %e used through the guide wall a#ter attaining desired depth

grouting works will commence and concreting o# primary secant pile will %e done.

Alternative excavation works will %e done. +elow #igure shows the se,uence o# work that

will %e adopted #or executing the Diaphragm wall work. 8rimary and Secondary panels are

installed with rein#orcement %ars.

0nce the D-all is done( excavation works will commence a#ter reaching to the %ottom o# designed temporary sla%. "oncreting works will commence only a#ter completion o# epoxy



16/19

grouting o# rein#orcement in to the secant pile and tie in with the temporary sla%

rein#orcement. $aunching head and ring %eam concreting 2support4 will %e constructed in

order to place the acking #rame setup.

A#ter completion o# D-wall works the machine will %e shi#ted to another location that is SBC;1= and the a%ove procedure will %e repeated.

S6 7/31 S6 7/28 S6 7/27 --------$!)%')!-------- S67/21

M'$! %))#*'), ''), !>

"ommencement o# )T+) works start with completion o# ' num%ers o# temporary sha#ts. Inthe Drive-=9 $ocation-' / Drive-' the driving o# micro tunnel starts #rom SB C;1= to SB C;1'

and #rom SB C;1= to SB C;1&.

S6 7/32 S6 7/31 S6 7/30

For the Drive-' #ollowing driving strategy will %e adopted

Driving #rom SB C;1= to SB C;1'

Driving #rom SB C;1= to SB C;1& Driving #rom SB C;'E to SB C;1&

Driving #rom SB C;'E to SB C;'C

Driving #rom SB C;'C to SB C;'!

Driving #rom SB C;'C to )B


17/19

Applying approved primer and tanking mem%rane.

"asting


18/19

Temporary sha#t works %egin with excavation o# trench to a depth o# = or ' meters and %y

installing cutting #rame on the %ed. Strands are connected to the cutting #rame and precast

segments are installed over the cutting #rame. Installation o# 5S) unit will commence and

a#ter installation o# the 5S) machine and its associated units. The excavated portion is#illed with %entonite and water and cutting heads will %e rotated all over the area o# the

temporary sha#t( pumping out the slurry and installation o# pre cast segment will %e carried

out till it reaches the desired level. "oncreting will %e done.

Installation o# 5S) unit alone will carry ?-< week duration and expected productivity is '

meter depth. A#ter completion o# sha#t SB C;=& the unit will %e shi#ted to another location.

M'$! %))#*'), ''), !>

Installation o# )icro tunnel unit will take 1 weeks #or diameter o# '?&& mm. For the Drive-?

#ollowing driving strategy will %e adopted

Driving #rom SB C;=& to SB C;E

Driving #rom SB C;C to SB C;E

Driving #rom SB C;C to SB C;!

Driving #rom SB C;3 to SB C;!

Driving #rom SB C;3 to SB C;<

Driving #rom SB C;? to SB C;<

Driving #rom SB C;? to SB C;1

Driving #rom SB C;= to S&!

Driving #rom SB C;3& to S&!

Driving #rom SB C;' to SB C;1

Driving #rom SB C;' to SB C;=

Driving #rom SB C;=& to SB C;==

For the a%ove driving works estimated working calendar duration is around 3=& days.



19/19

M+)!*# $!)%$%'!) !>

"onstruction o# manhole will %e similar to the manhole construction procedure at Drive-'.

Re,uired duration #or "ompletion o# manhole is around

2.lis 02 programme narrative 25.10.2015

Documents